heresy

[her-uh-see] / ˈhɛr ə si /

NOUN

unorthodox opinion, especially in religious matters

Synonyms

STRONGEST

blasphemy fallacy

STRONG

agnosticism apostasy atheism defection disbelief dissent dissidence divergence error heterodoxy iconoclasm impiety infidelity nonconformism nonconformity paganism revisionism schism sectarianism secularism sin

WEAK

misbelief

Antonyms

STRONG

agreement belief harmony

WEAK

orthodoxy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Eventually, science slipped the shackles of heresy and astronomers revolutionized our understanding of Earth’s place in the cosmos.

From The Wall Street Journal • Apr. 23, 2026

"This is eminently reasonable but was treated for many years as heresy," he added.

From BBC • Jul. 15, 2025

His brother confirmed in an interview with the city’s local station WGN-TV that he is a White Sox fan, refuting early heresy claiming he roots for the Cubs, aka Satan’s Stickballers.

From Salon • May 10, 2025

I realize this is heresy, but I think it’s important to acknowledge the irreducible strangeness of the drama.

From Los Angeles Times • Nov. 4, 2024

Matthew sat intent, ready to pounce on a hint of heresy.

From "The Witch of Blackbird Pond" by Elizabeth George Speare

Vocabulary lists containing heresy

Fahrenheit 451

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100 Words to Make You Sound Smart

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World Religions

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